I then fired up the "Tuscan" demo. It's a simple world consisting of a Tuscan-style house (interior and garden) overlooking water and a distant horizon.
The impressive things: Firstly, It really does wrap around an impressive amount of your field of view. Mind you, wearing glasses, I'm not used to the peripheral vision in my day-to-day life I'd have if I wore contact lenses so others may find the field of view much less than normal, but for me it was decent.
Secondly, the responsiveness was pretty amazing. I'd quickly move me head and the image kept completely in sync.